DE112011102940T5 - Variable camshaft timing mechanism with a standard mode - Google Patents

Abstract

A variable phaser having a control valve for directing fluid from a fluid input to and from the feed chamber and the delay chamber of the phaser through a feed line, a delay line, a common line, a feed standard line, a delay standard line, and at least one discharge line. The control valve is movable between a standard mode and an oil pressure operated mode. In the standard mode, the control valve blocks the drain lines and retains fluid within the chambers. The oil pressure actuated mode includes at least a feed mode, a deceleration mode, and a stop position.

Description

REFER TO RELATED APPLICATIONS

This application claims one or more inventions filed under provisional application number 61 / 389,451, filed October 4, 2010, entitled "STANDARD MODE VARIABLE CAMS TIME CONTROL MECHANISM", and provisional application number 61 / 417,943 filed on November 30, 2010 with US Pat Designation "VARIABLE CAMSHAFT TIME CONTROL MECHANISM WITH A STANDARD MODE". Herewith, 35 USC § 119 (e) is asserted on the provisional US applications, and the above-mentioned application is incorporated herein by reference.

BACKGROUND OF THE INVENTION

FIELD OF THE INVENTION

The invention relates to the field of variable camshaft timing mechanisms. More particularly, the invention relates to a hydraulic variable camshaft timing mechanism with a standard mode.

DESCRIPTION OF THE RELATED TECHNIQUE

Internal combustion engines have employed various mechanisms to vary the relative timing between the camshaft and the crankshaft for improved engine performance or reduced emissions. Most of these variable camshaft timing (VCT) mechanisms use one or more "vane phasers" on the engine camshaft (or camshafts in a multiple camshaft engine). As shown in the figures, vane adjusters have a rotor 105 with one or more wings 104 at the end of the camshaft 126 are attached by a housing assembly 100 surrounded by the wing chambers into which the wings fit. The wings 104 can be attached to the housing assembly 100 be attached and the chambers can also be in the rotor housing assembly 105 be attached. The outer circumference 101 of the housing forms the pinion, pulley or gear receiving motive power through a chain, belt or gearbox, usually from the crankshaft or possibly from another camshaft in a multi-cam engine.

In addition to the Camshaft Torque Actuated (VCTA) Variable Camshaft Timing (VCT) systems, most VCT hydraulic systems are operated using two principles, Oil Pressure Actuation (OPA) or Torsional Assist (TA) ). In the oil pressure actuated VCT systems, an oil control valve (OCV) directs the engine oil pressure to a working chamber in the VCT phaser, with the opposing working chamber defined by the housing, the rotor, and the vane being simultaneously vented. As a result, a pressure differential is created in one or more of the vanes to hydraulically push the VCT phaser in one direction or another direction. By neutralizing or moving the valve to a zero position, the same pressure is applied to the opposite sides of the vanes and the phaser is held in any intermediate position. When the phaser moves in such a direction that the valves open or close earlier, the phaser is advanced, and if the phaser moves in such a direction that the valves later open or close, the phaser is decelerated.

The torsion based (TA) systems operate on a similar principle, except that one or more check valves are provided to prevent the VCT phaser from moving in a direction opposite to the instructions if it encounters an opposing force such as torque is suspended.

The problem with OPA or TA systems is that the oil control valve moves to a default position where all the oil is drained from either the advance or retard work chambers and the opposite chamber is filled. By default, in this mode, the phaser moves in one direction to an outer stop that is engaged by the locking pin. The OPA or TA systems can not direct the VCT phaser to a different position during the engine start cycle if the engine is not building up oil pressure. As a result, the adjuster is restricted to move in one direction only in standard mode. In the past, this was acceptable because the VCT phaser, commanded by an engine shutdown and engine start, is commanded to lock at one of the outer travel limits (either full feed or full deceleration). However, recent calibration work has shown that it is of considerable benefit to start the engine when the VCT system is in an intermediate position and not at the outer stops.

In addition, because of the multiple angular movements on a VCT phaser in the midway position, it is necessary to start because the outer stops may be positions where the engine does not start or during engine startup is damaged. It is equally desirable that when the engine is off and the phaser is not in the optimum center launch position, the phaser may move in both directions during engine cranking to return to the optimum launch position anywhere in the middle path. The current OPA and TA-VCT systems are not capable of such a reset because they defer the oil from one of the working chambers (either feed or deceleration) by default, and thus make that chamber a non-operating chamber upon shutdown, so that the VCT adjuster can move in one direction only.

BRIEF SUMMARY OF THE INVENTION

A variable displacement camshaft phaser for an internal combustion engine includes a housing assembly, a rotor, and a control valve. The housing assembly has an outer periphery to receive a driving force, and the rotor assembly is coaxially disposed in the housing for connection to a neck shaft. The rotor has a plurality of vanes, with a vane separating a chamber formed between the housing and the rotor into a feed chamber and a delay chamber. The control valve directs fluid from a fluid input to and from the advancement chamber and the retard chamber through a feed line, a delay line, a common line, and at least one drain line. The control valve is movable between a standard mode and an oil pressure operated mode. The oil pressure actuated mode includes at least the control valve movable in a feed mode in which fluid is directed from the fluid input to the feed chamber and fluid is also directed from the retard chamber to at least one bleed line, a retarding mode in which fluid from the fluid input the delay chamber is directed and fluid is also passed from the feed chamber to at least one discharge line, and a holding position in which fluid is passed to both chambers. In the standard mode, the control valve blocks the at least one drain line, retaining fluid in the feed chamber and the delay chamber.

BRIEF DESCRIPTION OF THE DRAWING

Show it:

1 a schematic representation of a first embodiment of a torsion-based (TA) adjuster of the present invention, which moves to a feed position.

2 a schematic representation of a first embodiment of a torsion-based (TA) phaser of the present invention, which moves to a retard position.

3 a schematic representation of a first embodiment of a torsion-assisted (TA) adjuster of the present invention in a holding position.

4 a schematic representation of a first embodiment of a torsion-assisted (TA) phaser of the present invention with a standard hydraulic circuit in an open position and the stage in a locked position.

5 a schematic representation of a first embodiment of a torsion based (TA) phaser of the present invention with a standard hydraulic circuit in an open position and the stage, which moves through the standard circuit in the feed direction in a locked position.

6 a schematic representation of a first embodiment of a torsional (TA) phaser of the present invention with a standard hydraulic circuit in an open position and the stage, which moves through the standard circuit in the direction of delay in a locked position.

7 a schematic representation of a second embodiment of a torsion (TA) adjuster of the present invention with a standard hydraulic circuit in a closed position and the control valve in a holding position.

8th a schematic representation of a second embodiment of a torsion (TA) adjuster of the present invention with a standard hydraulic circuit in an open position and the control valve in a standard mode.

9 a schematic representation of a third embodiment of a torsion (TA) adjuster of the present invention with a standard hydraulic circuit in a closed position and the control valve in a holding position.

10 a schematic representation of a third embodiment of a torsion-assisted (TA) phaser of the present invention with a standard hydraulic circuit in an open position and the control valve in a standard mode.

11 a schematic representation of a fourth embodiment of a torsion (TA) adjuster of the present invention with a standard hydraulic circuit in a closed position and the control valve in a holding position.

12 a schematic representation of a fourth embodiment of a torsion-assisted (TA) adjuster of the present invention with a standard hydraulic circuit in an open position and the control valve in a standard mode.

13 a schematic representation of a fifth embodiment of a torsion (TA) adjuster of the present invention with a standard hydraulic circuit in an open position and the control valve in a standard mode.

14 a schematic representation of an alternative of the first embodiment of a torsion (TA) adjuster of the present invention with a standard hydraulic circuit only for the delay chamber.

15 a schematic representation of an alternative of the second embodiment of a torsion-assisted (TA) adjuster of the present invention with a standard hydraulic circuit only for the feed chamber.

16 a schematic representation of an alternative of the third embodiment of a torsion-assisted (TA) phaser of the present invention with a standard hydraulic circuit only for the feed chamber.

17 a schematic representation of an alternative of the fourth embodiment of a torsion (TA) adjuster of the present invention with a standard hydraulic circuit only for the feed chamber.

18 a schematic representation of an alternative of the fifth embodiment of a torsion-assisted (TA) phaser of the present invention with a standard hydraulic circuit only for the feed chamber.

DETAILED DESCRIPTION OF THE INVENTION

The present invention overcomes the limitations of torsional assist (TA) and oil pressure actuation (OPA) variable camshaft timing (VCT) systems such that one or more working chambers of TA or OPA CT phasers may be operated in a cam torque actuated (CTA) mode of operation. The invention utilizes the control valve in a standard mode and a standard hydraulic circuit to steer the VCT phaser in both directions, feed and deceleration, to reach the center lock position and, if desired, to engage a lock pin in the middle lock position , The following description and embodiments are described in terms of a torsion assist (TA) phaser having one or more check valves in oil feed lines. It will be understood, however, that an oil pressure operated phaser may also be used.

In the present invention, a staggered or remotely controlled pilot valve is added to a standard hydraulic circuit of a torsional or oil pressure actuated phaser to manage the standard hydraulic switching function.

The pilot valve can be controlled with the same hydraulic circuit that engages or disengages the lock pin. Thereby, the VCT control valve is shortened to two hydraulic circuits (as opposed to three, as explained in the background section of the invention) and a VCT control circuit and a combined lock pin / hydraulic standard control circuit. The movement of the pilot valve to the first position is actively controlled by the remotely controlled on / off valve or the control valve of the phaser.

One of the advantages of using the remote pilot valve is that it can have a longer stroke than the control valve because it is not limited by a magnet. Therefore, the pilot valve can open a larger flow passage for the hydraulic standard mode and improve the actuation rate in the standard mode. In addition, the position of the remote pilot valve shortens and simplifies the standard hydraulic circuit, thereby increasing the performance of the VCT standard mode or the phasing position of the phaser.

1 to 18 represent the operating modes of the VCT phaser depending on the spool valve position. The positions shown in the figures define the direction in which the VCT phaser moves. It will be understood that the phase control valve has an infinite number of intermediate positions such that the control valve not only controls the direction in which the VCT phaser moves but, depending on the discrete pusher position, controls the rate at which the VCT phaser controls the positions changes. Therefore, it will be understood that the phase control valve can be operated in infinite intermediate positions, and is not limited to the positions shown in the figures.

In relation to 1 to 6 The first embodiment has the housing assembly 100 the adjuster an outer circumference 101 for receiving a driving force. The rotor assembly 105 is with the camshaft 126 connected and in the housing assembly 100 arranged coaxially. The rotor assembly 105 has a wing 104 on, the one chamber 117 between the housing assembly 100 and the rotor assembly 105 is formed in a feed chamber 102 and a delay chamber 103 separates. The wing 104 can rotate to the relative angular position of the housing assembly 100 and the rotor assembly 105 to move. In addition, a standard hydraulic circuit 133 and a locking pin circuit 123 available. The standard hydraulic circuit 133 and the locking pin circuit 123 are essentially a circuit as explained above, but will be described separately for simplicity.

The standard hydraulic circuit 133 indicates with a spring 131 loaded pilot valve 130 and a feed standard line 128 that the feed chamber 102 with the pilot valve 130 and the common line 114 with the check valves 108 . 110 connects, as well as a delay standard line 134 on that the delay chamber 103 with the pilot valve 130 and the joint leadership 114 with the check valves 108 . 110 combines. The feed standard line 128 and the delay standard line 134 are a predetermined distance or length from the wing 104 away. The pilot valve 130 is located in the rotor assembly 105 and is fluid with the locking pin circuit 123 and direction 119a by line 132 connected. The locking pin circuit 123 has the locking pin 125 , the locking pin spring 124 , Management 132 , the pilot valve 130 , the supply line 119a and the drainage line 122 on.

The locking pin 125 is in a hole in the rotor assembly 105 slidably housed and has an end portion, which by a spring 124 to a deepening 127 in the housing assembly 100 is biased and fits into it. Alternatively, the locking pin 125 in the housing assembly 100 housed and by the spring 124 to a deepening 127 in the rotor assembly 105 be biased. Opening or closing the standard hydraulic circuit 133 and the pressurization of the locking pin circuit 123 Both are done by switching / moving the phase control valve 109 controlled.

A control valve 109 , preferably a slide valve, has a slide 111 with cylindrical elevations 111 . 111b . 111c . 111d and 111e on that in a pod 116 in a bore in the rotor 105 slidably received, and controls in the camshaft 126 , One end of the slider touches the spring 115 and the opposite end of the slider contacts a pulse width modulated variable force solenoid (VFS) 107 , The magnet 107 can also be linearly controlled by varying the current or voltage or other methods as needed. Also, the opposite end of the slider 111 touching and being affected by a motor or other actuators.

The position of the slider 111 is by a spring 115 influenced and the magnet 107 is from the ECU 106 controlled. Further details regarding the control of the phaser will be explained in detail below. The position of the slider 111 controls the movement (eg, to move to the feed position, the hold position, or the delay position) of the phaser and controls whether the lock pin circuit 123 and the standard hydraulic circuit 133 open (on) or closed (off). In other words, the position of the slider 111 actively controls the pilot valve. The control valve 109 has a feed mode, a delay mode, a stop position and a standard mode.

In feed mode, the slider 111 moved to such a position that fluid from the supply S through the pump 140 through the inlet check valve 118 through the pipe 119b to the feed chamber 102 can flow and fluid from the delay chamber 103 through the slider 111 from the drainage line 121 exit. The standard valve circuit 133 is switched off or closed and the locking pin 125 is preferably unlocked.

In deceleration mode, the slider 111 moved to such a position that fluid from the supply S through the pump 140 through the inlet check valve 118 through the pipe 119b to the delay chamber 103 can flow and fluid from the feed chamber 102 through the slider 111 from the drainage line 122 exit. The standard valve circuit 133 is off and the locking pin 125 is preferably unlocked.

In the stop position or in zero mode, the slider 111 moved to a position leading to the feed chamber 102 and to the delay chamber 103 is partially open and allows the supplied fluid in the feed and retardation chamber 102 . 103 flows, with the same pressure on the feed chamber and the delay chamber is applied to hold the wing position. The standard valve circuit 133 is off and the locking pin 125 is preferably unlocked.

In standard mode, three functions take place simultaneously.

The first function in standard mode is that the slider 111 moved to a position in the pusher elevations 111d and 111b prevent the flow of fluid from the line 112 and direction 113 through the drainage pipes 121 . 122 from the chambers 102 . 103 exit, and only allow a small amount of pressurized fluid from the feed S in the feed chamber 102 and the delay chamber 103 enters the feed and retard chambers 102 . 103 keep full, the control of the adjuster effective from the control valve 109 Will get removed.

The second function in standard mode is the standard valve circuit 133 to open or turn on. With the standard valve open, one or more of the torsional feed and retard chambers become 102 . 103 in a cam torque actuated (CTA) mode. In other words, fluid may be recirculated between the advancement chamber and the retard chamber rather than being filled into one chamber and drained in the opposite chamber and exiting through drain lines. The standard valve circuit 133 has complete control over the phaser, which is advanced or retracted until the wing 104 reaches the intermediate phase angle position.

The third function in standard mode is the lockout circuit 123 to vent so that the locking pin 125 into the depression 127 intervenes. The interphase angular position or center position is present when the wing 104 somewhere between the feedwall 102 and the delay wall 103a located the chamber between the housing assembly 100 and the rotor assembly 105 define. The intermediate phase angular position may be anywhere between the feedwall 102 and the delay wall 103a and is determined by where the standard passes 128 and 134 in relation to the wing 104 are located.

Based on the duty cycle of the pulse width modulated variable force magnet 107 the slider moves 111 to a corresponding position along its stroke. When the duty cycle of the variable force magnet 107 is about 30%, 50% or 100%, the slider will 111 at positions respectively corresponding to the deceleration mode, the stop position and the feed mode, and the pilot valve 130 is pressurized and moved to the second position, the standard hydraulic circuit 133 is closed and the locking pin 125 is pressurized and released. When the duty cycle of the variable force magnet 107 0% is the slider 111 moved to standard mode, so that the pilot valve 130 is vented and moved to the second position, the standard hydraulic circuit 133 is open and the locking pin 125 is vented and in the well 127 engaged. A 0% duty cycle was chosen as the outermost position along the shift clock to the standard hydraulic circuit 133 to open the pilot valve 130 to vent and the locking pin 125 to vent and in the recess 127 By default, the adjuster will default to a locked position in the event of a power or control loss. It should be noted that the above percentages for the duty cycle are examples and can be changed. In addition, if desired, the standard hydraulic circuit 133 be open at a duty cycle of 100%, the pilot valve 130 vented and the locking pin vented and in the recess 127 be engaged.

It should be noted that the duty cycle of the variable force magnet 107 of approximately 30%, 50% or 100% alternatively may correspond to the fact that the slider 111 is moved at positions corresponding respectively to the feed mode, the stop position and the deceleration mode.

1 represents the stage, which moves to the feed position. To move to the feed position, the duty cycle is increased to more than 50% up to 100%, the force of the VFS 107 on the slide 111 is increased and the slider 111 from the VFS 107 in a feed mode moves to the left until the force of the spring 115 the power of the VFS 107 balances. In the illustrated feed mode, the gate lift blocks 111c the drain line 122 and the pusher survey 111b prevents recirculation of fluid between the feed chamber 102 and the delay chamber 103 , The administration 112 is to feed S out of pipe 119b open and the line 113 is to the drain line 121 open to fluid from the delay chamber 103 drain. Hydraulic fluid is removed from the supply S by the pump 140 passed to the stage and passes through a cam interface 120 into the pipe 119 one. The administration 119 splits into two lines 119a and 119b on. The administration 119b leads to an inlet check valve 118 and the control valve 109 , From the control valve 109 Fluid enters the line 112 and the feed chamber 102 one, with the wing 104 is moved in the direction shown by the arrow and is caused to be fluid from the delay chamber 103 moved out and into the pipe 113 to the control valve 109 exit and through the drainage line 121 is drained into the oil pan.

The administration 119a leads to the locking pin 125 and branches into the pipe 132 off to the pilot valve 130 leads. The pressure of the fluid in the pipe 119a moves through the slide 111 between the surveys 111d and 111e to the locking pin 125 against the spring 124 to bias in a released position, so that the locking pin circuit 123 is filled with fluid. The fluid in the pipe 119a also flows through the pipe 132 and acts on the pilot valve 130 against the spring 131 with pressure, so that the pilot valve 130 moved to a position at which the delay standard line 134 , the feed standard line 128 and the line 129 are blocked, as in 1 shown, and the standard circuit is switched off. The drainage line 122 gets through the pusher elevation 111d blocked, causing the venting of the locking pin 125 is prevented.

2 represents the phaser moving to the deceleration position. To move to the deceleration position, the duty cycle is set to more than 30%, but less than 50%, the force of the VFS 107 on the slide 111 is changed and the slider 111 is by the spring 115 in a deceleration mode in the figure moves to the right until the force of the spring 115 the power of the VFS 107 balances. In the illustrated deceleration mode, the spool lift blocks 111b the drain line 121 and the pusher survey 111c prevents recirculation of fluid between the feed chamber 102 and the delay chamber 103 , The administration 113 is to feed S out of pipe 119b open and the line 112 is to the drain line 121 open to fluid from the feed chamber 102 drain. Hydraulic fluid is removed from the supply S by the pump 140 passed to the stage and passes through a cam interface 120 into the pipe 119 one. The administration 119 splits into two lines 119a and 119b on. The administration 119b leads to an inlet check valve 118 and the control valve 109 , From the control valve 109 Fluid enters the line 113 and the delay chamber, with the wing 104 is moved in the direction shown by the arrow and is caused to be fluid from the feed chamber 102 moved out and into the pipe 112 to the control valve 109 exit and through the drainage line 122 is drained into the oil pan.

The administration 119a leads to the locking pin 125 and branches into the pipe 132 off to the pilot valve 130 leads. The pressure of the fluid in the pipe 119a moves through the slide 111 between the surveys 111d and 111e to the locking pin 125 against the spring 124 to bias in a released position, so that the locking pin circuit 123 is filled with fluid. The fluid in the pipe 119a also flows through the pipe 132 and acts on the pilot valve 130 against the spring 131 with pressure, so that the pilot valve 130 moved to a position at which the delay standard line 134 and the feed standard line 128 are blocked and the standard circuit is switched off. The drainage line 122 is through the pusher survey 111d blocked, causing the venting of the locking pin 125 and the pilot valve 130 is prevented.

3 represents the phaser in the stop position. In this position, the duty cycle of the variable force magnet is 107 50% and the power of VFS 107 at one end of the slider 111 corresponds to the force of the spring 115 on the opposite end of the slider 111 in hold mode. The surveys 111b and 111c allow fluid from the feed S into the feed chamber 102 and the delay chamber 103 flows. The drainage line 121 is through the slider lift 111b from the line 113 escaping fluid blocks and the drain line 122 is through the slider lift 111c from the line 112 escaping fluid blocked. The administration 119 splits into two lines 119a and 119b on. The administration 119b leads to the inlet check valve 118 and the control valve 109 , From the control valve 109 Fluid enters the lines 112 and 113 and enters the feed chamber 102 and the delay chamber 103 one. The administration 119a leads to the locking pin 125 and branches into the pipe 132 off to the pilot valve 130 leads. The pressure of the fluid in the pipe 119a moves through the slide 111 between the elevations, around the locking pin 125 against the spring 124 to bias in a released position, so that the locking pin circuit 123 is filled. The fluid in the pipe 119a also flows through the pipe 132 and acts on the pilot valve 130 against the spring 131 with pressure, so that the pilot valve 130 moved to a position in which the delay standard line 134 and the feed standard line 128 from the line 129 and are blocked from each other, as in 3 represented, and the standard circuit 133 is switched off. The drainage line 122 is through the pusher survey 111d blocked, causing the venting of the locking pin 125 and the pilot valve 130 is prevented.

In relation to 4 to 6 when the duty cycle of the variable force magnet 107 0%, the slide is in standard mode, the pilot valve 130 is vented, the standard hydraulic circuit 133 is open or turned on and the locking pin circuit 123 is switched off or closed, the locking pin 125 is vented and gets to the recess 127 engaged, and the rotor 105 is in relation to the housing assembly 100 locked in a center position or an intermediate phase angle position. Depending on where the wing is 104 before the duty cycle of the variable force magnet 107 which is 0% is changed, is either the feed standard line 128 or the delay standard line 134 for the feed or delay chamber 102 . 103 Approved. In addition, if the engine has experienced an abnormal shutdown (eg, when the engine stalls), the duty cycle of the variable force solenoid would be at engine startup 107 0%, the rotor assembly 105 would be over the standard circuit 133 move to the middle lock position or an intermediate phase angle position and the lock pin 125 would be engaged in the mid-position or intermediate-phase angular position, regardless of what position the wing is in 104 with respect to the housing assembly 100 before the abnormal shutdown of the engine. In the present invention, the standard mode is preferably when the slider is an outer path end. In the examples illustrated in the present invention, this is the case when the slider is at an outer fully extended position from the bore.

The ability of the phaser of the present invention to move to a center position or an intermediate phase angular position by default without the use of electronic controls allows the phaser to move to center or intermediate phase angular position even during engine cranking when electronic controls typically are not used to control the phaser position become. Also, by default, the phaser moves to the mid-position or inter-phase angular position, providing a fail-safe position, particularly when control signals or energy are lost, thereby ensuring that the engine can start and run even without active VCT phaser control. Since the phaser is in center position or intermediate phase angular position when the engine is started, the longer path of the phase of the phaser is possible, allowing for calibration capabilities. In the prior art, longer displacement or longer phase angle stages are not possible because the center position or the intermediate phase angle position is not present at engine start or engine start and the engine has difficulty starting at the outermost feed or deceleration stop.

When the duty cycle of the variable force magnet 107 is set to 0%, the force on the VFS takes on the slider 111 off and the spring 115 moves the slider 111 to the far right end of the spool path to a standard position, as in 4 to 6 shown. In this default position, the slider bump blocks 111b the flow of fluid from the line 113 to the drain opening 121 and the pusher survey 111d blocks the flow of fluid from the line 112 to the drain opening 122 , thereby effectively controlling the phaser from the control valve 109 Will get removed. At the same time fluid from the supply through the line 119 to the line 119b and the inlet check valve 118 and at the pusher elevation 111c over and through the line 112 respectively. 113 in the feed chamber 102 or the delay chamber 103 stream. The flow of fluid through the pipe 119a to the lock pin over the slider bump 111e will be prevented. Because the fluid is not to the line 119a flow, becomes the locking pin 125 no longer pressurized and through the slide 111 between the pusher elevation 111d and the pusher survey 111e to the drainage line 122 vented. Similarly, the pilot valve 130 also to the drainage line 122 vented so that the passage between the feed standard line 128 and the delay standard line 134 through the pilot valve 130 to the line 129 and the common line 114 is opened, in other words the standard hydraulic circuit 133 and substantially all torsion based chambers are converted to cam torque actuated chambers (CTA) or placed in the CTA mode with fluid between the feed chamber 102 and the delay chamber 103 can flow.

If the wing 104 in relation to 5 within the housing assembly 100 is placed near or in the feed position and the deceleration standard line 134 the delay chamber 103 is released, then fluid flows from the delay chamber 103 into the delay standard line 134 and through the open pilot valve 130 and to the lead 129 leading to the common line 114 leads. From the common line 114 Fluid flows through the check valve 108 and in the feed chamber 102 , causing the wing 104 with respect to the housing assembly 100 for closing the delay standard line 134 to the delay chamber 103 is moved. Because the rotor 105 the delay standard line 134 from the delay chamber 103 completes, the wing becomes 104 moved to a center position or intermediate phase angle position within the chamber, which is between the housing assembly 100 and the rotor assembly 105 is formed, and the locking pin 125 aligns with the depression 127 out, causing the rotor 105 with respect to the housing assembly 100 is locked in a middle position or intermediate phase angle position.

If the wing 104 in relation to 6 within the housing assembly 100 is placed near or in the retard position and the feed standard line 128 the delay chamber 102 is released, then fluid flows from the feed chamber 102 in the Retard default line 128 and through the open pilot valve 130 and to the lead 129 leading to the common line 114 leads. From the common line 114 Fluid flows through the check valve 110 and in the delay chamber 103 , causing the wing 104 with respect to the housing assembly 100 for closing the feed standard line 128 to the feed chamber 102 is moved. Because the rotor 105 the feed standard line 128 from the feed chamber 102 completes, the wing becomes 104 moved to a center position or intermediate phase angle position within the chamber, which is between the housing assembly 100 and the rotor assembly 105 is formed, and the locking pin 125 aligns with the depression 127 out, causing the rotor 105 with respect to the housing assembly 100 is locked in a middle position or intermediate phase angle position.

The feed standard line 128 and the delay standard line 134 be through the rotor assembly 105 from the feed and deceleration chambers 102 . 103 completely closed or blocked when the phaser is in the center position or intermediate phase angle position, which requires that the locking pin 125 with the recess 127 at the precise moment when the feed standard line 128 or the delay standard line 134 completed by their respective chambers. Alternatively, the feed standard line 128 and the delay standard line 134 slightly open or partially to the feed and deceleration chamber 102 . 103 be limited in the center position or intermediate phase angle position, so that the rotor assembly 105 can swing easily, so the locking pin 125 more likely about the position of the depression 127 drives, so the locking pin 125 with the recess 127 can be engaged.

In relation to 14 , an alternative embodiment, is the standard circuit 433 only for the delay chamber 103 available and supports the search for a middle position stop in one direction. The locking circuit 433 allows the adjuster to oscillate between the mid-position stop and one of the outer stops, for example, the wing 104 with the feedwall 102 or the delay wall 103a in contact.

The difference between the embodiment 14 and the first embodiment 1 to 6 consists in the removal of the feed standard line 128 and the check valve 108 between the common line 114 , Management 112 and the feed chamber 102 , For this embodiment, identical reference numerals as in the previous figures are used for the description above and are repeated herein by reference.

The standard hydraulic circuit 433 indicates by a spring 131 preloaded pilot valve 130 on, that with a delay standard line 134 connected to the delay chamber 103 with the pilot valve 130 and the joint leadership 114 with the check valve 110 combines. The default delay line 134 is at a predetermined distance or length from the wing 104 , The pilot valve 130 is located in the rotor assembly 105 and stands with the lock pin circuit 123 and direction 119a via wire 132 in fluid exchange. The locking pin circuit 123 has a locking pin 125 , a locking pin spring 124 , The administration 132 , the pilot valve 130 , the supply line 119a and the drainage line 122 on.

In standard mode, the slider moves 111 in a position where the pusher elevations 111d and 111b the flow of fluid from conduit 112 and direction 113 block so this is the chambers 102 . 103 through the drainage pipes 121 . 122 can not leave, and only a small amount of pressurized fluid from the supply S in the feed chamber 102 and the delay chamber 103 reach the feed and deceleration chambers 102 . 103 to keep it fully, so that the control of the phaser from the control valve 109 can be effectively removed.

If the standard valve circuit 433 is on or open, and the standard valve is open, become one or more of the torsion-based feed and retard chambers 102 . 103 placed in the cam torque actuated (CTA) mode. In other words, fluid may be recirculated between the advancement chamber and the retard chamber rather than being filled into one chamber and drained in the opposite chamber and exiting through drain lines into the sump. The standard valve circuit 433 has complete control over the phaser, which is advanced or retracted until the wing 104 reaches the intermediate phase angle position.

In standard mode, the locking pin circuit 123 vented so that the locking pin 125 into the depression 127 intervenes. The interphase angular position or center position is present when the wing 104 somewhere between the feedwall 102 and the delay wall 103a located the chamber between the housing assembly 100 and the rotor assembly 105 define. The intermediate phase angular position may be anywhere between the feedwall 102 and the delay wall 103a and is determined by where the default delay pass 134 in relation to the wing 104 located.

Depending on where the wing is 104 before the duty cycle of the variable force magnet 107 , which was changed to 0%, fluid exits the delay chamber 102 through the pipe 112 and flows into the common line 114 through the check valve 110 to the delay chamber 103 through the pipe 113 , While the delay chamber 103 fills, becomes the default delay line 134 Released and the fluid in the delay chamber 103 back to the delay chamber 103 or feed chamber 102 guided, depending on the direction of the cam torque through the pilot valve 130 , Therefore, the adjuster can move freely in the direction of deceleration until the wing 104 with the feedwall 102 comes into contact.

In the feed direction, when the hydraulic lock circuit is open, the stage moves until the default deceleration line 134 from the case 100 is completed. The default delay line 134 is from the rotor assembly 105 from the delay chamber 103 closed or blocked when the phaser is in the mid-position or inter-phase angular position where the locking pin is required 125 into the depression 127 is engaged at the precise time at which the delay standard line 134 completed by their respective chambers. When the locking pin 125 not in the depression 127 engages, swing the rotor 105 and the wing 104 between a locking position where the delay standard line 134 from the case 100 and the full deceleration stop is blocked (eg, on the side with the shortest path between the center position lock of the lock pin), the wing 104 with the delay wall 102 comes into contact. When the adjuster vibrates, the locking pin disengages 125 finally with the recess 127 and locks the stage in the middle position.

One of the advantages of providing only one standard conduit on one side of the phaser is the lower cost, because only one and not two check valves are needed and less phasing of the phaser is required.

It is preferred that the check valve and the default line be provided on the side of the longest pathway for the lock pin for engaging the recess rather than the check valve and the default line having the shortest path of the lock pin for engaging the recess be provided, whereby the amount of vibration to the side, z. B. is limited between the intermediate phase angle or the central position stop and the outer stop and thus the stronger vibration occurs at one end of the wing path.

Alternatively, the check valve and the standard line on the opposite side, for example, the check valve 110 and the feed standard line 134 , also be removed.

7 to 8th illustrate a second embodiment of the present invention in which a set of torsion-based feed and retard chambers is switched to the CTA mode in which fluid can be circulated between the feed chamber and the retard chamber. The most important difference between the first embodiment and the second embodiment is that in the first embodiment, all sets of torsion-based feed and retard chambers 102 . 103 be put into the CTA mode when the default circuit 233 is turned on, whereas a set of torsional feed and retard chambers is placed in the CTA mode when the standard circuit is turned on. In addition, the control valve opens 109 a flow path between one or more sets of the torsional feed and retard chambers 102 . 103 and simultaneously isolate one or more sets of chambers 202 . 203 in a CTA mode to the standard hydraulic circuit 103 apply. If the standard circuit 233 is turned off, the one set of chambers 202 . 203 set back in CTA mode for the feed and deceleration chambers to operate in the torsion-assisted mode. One of the advantages of the phaser of this embodiment is that the phaser can operate faster by using only a small number of chambers for the standard hydraulic circuit in standard hydraulic mode, especially at high oil viscosities.

7 shows the stage in the stop position and the control valve in the stop position. 8th shows the control valve 109 in standard mode and the standard hydraulic circuit 233 when switched on. The feed mode and the deceleration mode are not shown but are similar to those 1 and 2 the first embodiment, wherein the hydraulic circuit 133 is switched off. The standard hydraulic circuit 233 indicates by a spring 231 preloaded pilot valve 230 and a feed standard line 128 on which the switched torsion-based feed chamber 202 , which is now in CTA mode, with the pilot valve 203 and the common line 214 connects, and a delay standard line 134 containing the switched torsion-based delay chamber 203 , which is now in CTA mode, with the pilot valve 230 and the common line 214 combines.

In relation to 7 is the duty cycle of the variable force magnet 107 50% and the power of VFS 107 on one end of the slider 111 is equal to the force of the spring 115 on the opposite end of the slider 111 in holding position. The surveys 111b and 111c block the fluid flow between the lines 112 and 113 , which relates to the torsion-based feed and retard chambers and lines 212 and 213 leading to the feed and deceleration chambers 202 . 203 to the drainage pipes 122 and 121 to lead. However, the pusher surveys are 111b and 111c positioned so that fluid in the pipes 112 and 113 which can flow to the torsion-based feed and deceleration chambers 102 . 103 lead, with fluid also in the feed and deceleration chambers 202 . 203 flow or have a limited inflow into this, to prevent leakage through the pilot valve and the lines 212 and 213 compensate.

The fluid is the adjuster of the supply S by the pump 140 supplied and passes through a camshaft interface 120 into the pipe 119 one. The administration 119 splits into two lines 119a and 119b on. The administration 119b leads to the inlet check valve 118 and the control valve 109 , From the control valve 109 Fluid enters the lines 112 . 113 to the TA feed and delay chambers 102 . 103 cause the same pressure on the feed chamber 102 like on the delay chamber 103 is exercised to hold the wing in place.

The administration 119a leads to the pilot valve 230 , The pressure of the fluid in line 119a moves through the slide 111 between the surveys 111d and 111e to lead 132 to the pilot valve 230 against the spring 231 to push, causing the pilot valve 230 is moved to a position in which the delay standard line 134 , Feed standard line 128 are blocked and the standard circuit is switched off. The drainage line 122 is from the pusher survey 111d blocked, allowing the vent or opening the standard circuit 233 is prevented.

8th shows the phaser in the mid-position or inter-phase angular position, where the duty cycle of the variable force magnet is 0%, the slider 109 in standard mode, the pilot valve 300 through the slide to passage 122 vented to the oil pan or the drain, the standard hydraulic circuit 233 open or turned on. The one set of feed and deceleration chambers 202 . 203 is switched from the torsion-based mode to the CTA mode.

Depending on where the wing is 104 before the duty cycle of the variable force magnet 107 that was changed to 0% will become either the feed standard line 128 or the delay standard line 134 the CTA mode feed / delay chamber 202 . 203 Approved. In addition, if the engine has experienced an abnormal shutdown (eg, when the engine stalls), the duty cycle of the variable force solenoid would be at engine startup 107 0%, the rotor assembly 105 would move via the standard circuit to the center position or the inter-phase angular position and the lock pin 125 would be engaged in the mid-position or intermediate-phase angular position, regardless of what position the wing is in 104 with respect to the housing assembly 100 before the abnormal shutdown of the engine.

The ability of the phaser of the present invention to move to a center position or an intermediate phase angular position by default without the use of electronic controls allows the phaser to move to center or intermediate phase angular position even during engine cranking when electronic controls typically are not used to control the phaser position become. Also, by default, the phaser moves to the mid-position or inter-phase angular position, providing a fail-safe position, particularly when control signals or energy are lost, thereby ensuring that the engine can start and run even without active VCT phaser control. Since the phaser is in the center position or intermediate phase angular position when the engine is started, a longer path of the phase of the phaser is possible, allowing for calibration capabilities. In the prior art, longer displacement or longer phase angle stages are not possible because the center position or the intermediate phase angle position is not present at engine start or engine start and the engine has difficulty starting at the outermost feed or deceleration stop.

When the duty cycle of the variable force magnet 107 set to 0%, the force on the VFS is applied to the slider 111 reduced and the spring 115 moves the slider 111 completely to the outer right end of the slide path in a standard mode, as in 8th shown. In standard mode, the pusher blocks 111b the fluid flow from line 112 to the drainage line 121 and the pusher survey 111d blocks the fluid flow from the line 113 to the drainage line 122 so that fluid from the supply can circulate openly between the torsional feed and retard chambers, whereby the control of the Effectively from the control valve 109 Will get removed. At the same time fluid from the supply through the line 119 to the line 119b and inlet check valve 118 to the wires 112 . 113 flow to the torsion-based feed and deceleration chambers 102 . 103 lead, as described above, and in the common line 214 , through the pilot valve 230 and through a check valve 208 . 210 either in the feed chamber in the CTA mode or the delay chamber in the CTA mode through the lines 212 . 213 stream.

Through the slide survey 111e will prevent fluid from passing through the pipe 119a to the pilot valve 230 flows. Because no fluid to the line 119a can flow, bleeds the pilot valve 230 to the drainage line 122 , whereby the passage between the feed standard line 128 and the delay standard line 134 through the pilot valve 230 to lead 229 and the common line 214 is opened, in other words, the standard hydraulic circuit 233 opened or switched on.

If the wing 104 within the housing assembly 100 is arranged near or in the retard position and the feed standard line 128 for the CTA mode feed chamber 202 is released, then fluid flows from the CTA mode feed chamber 202 in the feed standard line 128 and through the open pilot valve 230 and to lead 229 leading to the common line 214 leads, as in 8th shown. From the common line 214 Fluid flows through the check valve 210 and into the CTA mode delay chamber 203 , and the wing 104 is in relation to the housing assembly 100 for closing or blocking the feed standard line 128 to the CTA mode feed chamber 20 emotional. While the rotor assembly 105 the feed standard line 128 from the CTA mode feed chamber 202 completes, the wing becomes 104 to a center position or intermediate phase angle position within the chamber 117 moves between the housing assembly 100 and rotor assembly 105 is trained.

If the wing 104 within the housing assembly 100 is arranged near or in the feed position and the deceleration standard line 134 for the CTA mode delay chamber 203 is released, then fluid flows from the CTA mode retard chamber 203 into the delay standard line 134 and through the open pilot valve 230 and to lead 229 leading to the common line 214 leads. From the common line 214 Fluid flows through the check valve 210 and into the CTA mode feed chamber 202 , and the wing 104 is in relation to the housing assembly 100 for closing the delay standard line 134 from the CTA mode delay chamber 20 emotional. While the rotor assembly 105 the delay standard line 134 from the CTA mode delay chamber 203 completes, the wing becomes 104 moved to a center position or intermediate phase angle position within the chamber, which is between the housing assembly 100 and rotor assembly 105 is trained.

The feed standard line 128 and the delay standard line 134 be through the rotor assembly 105 from the CTA mode feed and deceleration chambers 202 . 203 completely closed or blocked when the phaser is in the center position or intermediate phase angle position, which requires that the locking pin 125 into the depression 127 engages exactly at the time at which the feed standard line 128 or the delay standard line 134 be completed by their respective chambers. Alternatively, the feed standard line 128 and the delay standard line 134 in the center position or intermediate phase angle position slightly open or partially to the CTA mode feed and deceleration chamber 202 . 203 be limited so that the rotor assembly 105 can swing easily, so the locking pin 125 more likely about the position of the depression 127 drives, so the locking pin 125 into the depression 127 can intervene.

15 shows an alternative embodiment in which a standard circuit 533 only for the CTA mode feed chamber 202 present and assist in the search for a one-way mid-position stop. The locking circuit 533 allows the adjuster to oscillate between the mid-position stop and one of the outer stops, for example, the wing 104 with the feedwall 202a or the delay wall 203a in contact.

The difference between the embodiment 15 and the second embodiment in FIG 7 to 8th is the removal of the delay standard line 134 and the check valve 210 between the common line 214 , Management 213 and the CTA mode delay chamber 203 , For this embodiment, identical reference numerals as in the previous figures are used for the description above and are repeated herein by reference.

The standard hydraulic circuit 533 indicates by a spring 231 preloaded pilot valve 230 and a feed standard line 128 on which the switched torsion-based feed chamber 202 , which is now in CTA mode, with the pilot valve 230 and the common line 214 with the check valve 208 combines. The feed standard line 128 is at a predetermined distance or length from the wing 104 , The pilot valve 230 is located in the rotor assembly 105 and stands with the lock pin circuit 123 and direction 119a via wire 132 in fluid exchange. The locking pin circuit 123 has a locking pin 125 , a locking pin spring 124 , Management 132 , the pilot valve 230 , Feed line 119a and drain line 122 on.

Depending on where the wing is 104 before the duty cycle of the variable force magnet 107 , which was changed to 0%, fluid exits the CTA mode delay chamber 203 through the pipe 213 and flows into the common line 214 through the check valve 208 to the CAT mode feed chamber 202 through the pipe 212 , While the CTA mode feed chamber 202 fills, the feed standard line becomes 128 released and the fluid in the CTA mode feed chamber 202 gets back to the CTA mode feed chamber 202 or CTA mode delay chamber 203 directed, depending on the direction of the cam torque through the pilot valve 230 , Therefore, the adjuster can move freely in the feed direction until the wing 104 the delay wall 203a contacted.

In standard mode, the pusher blocks 111b the fluid flow from the line 112 to the drainage performance 121 and the pusher survey 111d blocks the fluid flow from the line 113 to the drainage performance 122 , whereby the fluid from the supply is open between the torsion-based advance and retard chambers 102 . 103 can circulate to effectively control the phaser from the control valve 109 to remove. At the same time fluid from the supply by line 119 to lead 119b and the inlet check valve 118 to the wires 112 . 113 flow to the torsion-based feed and deceleration chambers 102 . 103 lead, as described above, and in the common line 214 through the pilot valve 230 and through the check valve 208 and by administration 212 into the CTA mode feed chamber 202 or by line 213 into the CTA mode delay chamber 203 ,

Through the slide survey 111e will prevent fluid from passing through the pipe 119a to the pilot valve 230 flows. Because no fluid to the line 119a can flow, bleeds the pilot valve 230 to the drainage line 122 and opens the passage between the feed standard line 128 through the pilot valve 230 to lead 229 and the common line 214 in other words, opens or switches the standard hydraulic circuit 533 one.

When the hydraulic lock circuit is open in the retard direction, the stage moves until the feed standard line 128 from the case 100 is completed. The feed standard line 128 is from the rotor assembly 105 from the CTA mode feed chamber 202 closed or blocked when the phaser is in the mid-position or intermediate-phase angular position where it is required that the locking pin 125 into the depression 127 engages exactly at the time when the feed standard line 128 completed by their respective chambers. When the locking pin 125 not in the depression 127 engages, swing the rotor 105 and the wing 104 between a locking position at which the feed standard line 128 from the case 100 is blocked, and a full feed stop (eg on the side with the shortest path between the center position lock of the locking pin), where the wing 104 with the delay wall 203a comes into contact. When the adjuster vibrates, the locking pin disengages 125 finally with the recess 127 and locks the stage in the middle position.

One of the advantages of providing only one standard conduit on one side of the phaser is the lower cost, because only one and not two check valves are needed and less phasing of the phaser is required.

It is preferred that the check valve and the default line be provided on the side of the longest pathway for the lock pin for engaging the recess rather than the check valve and the default line having the shortest path of the lock pin for engaging the recess be provided, whereby the amount of vibration to the side, z. B. is limited between the intermediate phase angle or the central position stop and the outer stop and thus the stronger vibration occurs at one end of the wing path.

Alternatively, the check valve and the standard line on the opposite side, for example, check valve 208 and feed standard line 128 , also be removed.

9 to 10 show a third embodiment of the present invention, in which a set of chambers 302 . 303 regardless of the torsion-based operating rates of chambers 102 . 103 is isolated and works only in CTA mode. In other words, the CTA mode set of feed and deceleration chambers 302 . 303 operate independently of the set (s) of torsion feed and retard chambers 102 . 103 , The third embodiment is similar to the second embodiment in that both the torsion-based chambers 102 . 103 as well as the CTA mode chambers 302 . 303 However, the chamber sets are isolated such that one or more sets of torsion-based working chambers 102 . 103 control the position of the phaser when operating with a closed loop control and one or more sets of CTA mode chambers 302 . 303 which only work in standard hydraulic mode. A set of torsion-based working chambers 102 . 103 is through the control valve 109 from "working" or advancing, delaying or keeping switched to recycle. A set of CTA mode chambers 302 . 303 is switched from "working" or returning oil between the chambers either to advancing or retarding the chambers in terms of reaching the mid-position lock in the return mode when the standard valve is closed.

9 shows the stage in the stop position and the control valve in the stop position. 10 shows the control valve 109 in standard mode and the standard hydraulic circuit at 333 turned on. The feed mode and the deceleration mode are not shown but are similar to those 1 and 2 the first embodiment, wherein the hydraulic circuit 133 is switched off. The standard hydraulic circuit 333 indicates by a spring 331 preloaded pilot valve 330 and a feed standard line 128 on top of the CTA mode feed chamber 302 with the pilot valve 300 and the joint management 314 connects, and a delay standard line 134 containing the CTA mode delay chamber 303 with the pilot valve 330 and the common line 314 combines.

In relation to 9 is the duty cycle of the variable force magnet 107 50% and the power of VFS 107 on one end of the slider 111 is equal to the force of the spring 115 on the opposite end of the slider 111 in holding position. The surveys 111b and 111c block the fluid flow from the lines 112 and 113 leading to the torsion-based feed and deceleration chambers 102 . 103 and the common line 314 lead, and prevent fluid from the drain lines 122 and 121 is drained. The wires 112 and 113 are open to supply fluid to the torsion feed and retard chambers 102 . 103 to lead. Fluid can also be in the common line 314 flow to leaks through the pilot valve, the check valves 308 . 310 and the wires 312 and 313 to the CTA mode feed and retard chambers 302 . 303 compensate.

The fluid is the adjuster of the supply S by the pump 140 supplied and passes through a camshaft interface 120 into the pipe 119 one. The administration 119 splits into two lines 119a and 119b on. The administration 119b leads to the inlet check valve 118 and the control valve 109 , The slide surveys 111b and 111c are positioned so that fluid in the pipes 112 and 113 flow to the torsion-based feed and retard chambers 102 . 103 cause the same pressure on the feed chamber 102 like on the delay chamber 103 is exercised to hold the wing in place.

The administration 119a leads to the pilot valve 330 , The pressure of the fluid in line 119a moves through the slide 111 between the surveys 111d and 111e to lead 132 to the pilot valve 330 against the spring 331 to push, causing the pilot valve 330 is moved to a position in which the delay standard line 134 , Feed standard line 128 are blocked and the standard circuit is switched off. However, the fluid can be unrestricted and free between the CTA feed chamber 302 and the CTA delay chamber 303 through the pilot valve 330 flow when the standard hydraulic circuit 333 is switched off. The drainage line 122 is from the pusher survey 111d blocked, allowing the vent or opening the standard circuit 333 is prevented.

10 Fig. 12 shows the phaser in the middle position or intermediate phase angle position where the duty cycle of the variable force magnet is 0%, the slider 109 in standard mode, the slider survey 111c is arranged such that the fluid from the supply S 121 is open to between the torsion-based feed chamber 102 and the torsion-based delay chamber 103 free to flow, and the pilot valve 330 becomes passage through the slider 122 vented, leading to the oil pan or drain, using the standard hydraulic circuit 333 open or turned on.

Depending on where the wing is 104 before the duty cycle of the variable force magnet 107 that was changed to 0% will become either the feed standard line 128 or the delay standard line 134 the CTA mode feed or deceleration chamber 302 . 303 Approved. In addition, if the engine has experienced an abnormal shutdown (eg, when the engine stalls), the duty cycle of the variable force solenoid would be at engine startup 107 0%, the rotor assembly 105 would move via the standard circuit to the center position or the inter-phase angular position and the lock pin 125 would be engaged in the center position or intermediate phase angle position, regardless of which position the wing 104 with respect to the housing assembly 100 before the abnormal shutdown of the engine.

The ability of the phaser of the present invention to move to a center position or an intermediate phase angular position by default without the use of electronic controls allows the phaser to move to center or intermediate phase angular position even during engine cranking, unless electronic controls typically use mm camshaft position control become. Also, by default, the phaser moves to the mid-position or inter-phase angular position, providing a fail-safe position, particularly when control signals or energy are lost, thereby ensuring that the engine can start and run even without active VCT phaser control. Since the phaser is in the center position or intermediate phase angular position when the engine is started, a longer path of the phase of the phaser is possible, allowing for calibration capabilities. In the prior art, longer displacement or longer phase angle stages are not possible because the center position or the intermediate phase angle position is not present at engine start or engine start and the engine has difficulty starting at the outermost feed or deceleration stop.

When the duty cycle of the magnet with variable force 107 set to 0%, the force of the VFS is on the slider 111 reduced and the spring 115 moves the slider 111 complete to the outer right end of the slide path in a standard mode, as in 10 shown. In standard mode, the pusher blocks 111b the flow of fluid from the line 112 to the drainage performance 121 and the pusher survey 111d blocks the flow of fluid from the line 113 to the drainage performance 122 , and the pusher survey 111c is positioned so that fluid from the supply is open or free between the TA advance and retard chambers 102 . 103 can circulate to effectively control the phaser from the control valve 109 to remove. At the same time fluid from the supply by line 119 to lead 119b and the inlet check valve 118 to the wires 112 . 113 flow to the TA feed and retard chambers 102 . 103 lead, as described above, and in the common line 314 and through a check valve 308 . 310 and either into the CTA mode feed chamber 302 or CTA mode delay chamber 303 through the pipes 312 . 313 , The unimpeded flow of fluid between the CTA mode feed chamber 302 and the CTA mode delay chamber 303 is from the pilot valve 330 prevented.

Through the slide survey 111e will prevent fluid from passing through the pipe 119a to the pilot valve 330 flows. Because no fluid to the line 119a can flow, the pilot valve emptied 330 to the drainage line 122 and opens the passage between the feed standard line 128 and the delay standard line 134 through the pilot valve 330 to lead 329 and the common line 314 in other words, it opens or shuts off the standard hydraulic circuit 333 at.

If the wing 104 within the housing assembly 100 is arranged near or in the retard position and the feed standard line 128 for the CTA mode feed chamber 302 is released, then fluid flows from the CTA mode feed chamber 302 in the feed standard line 128 and through the open pilot valve 330 and to lead 329 leading to the common line 314 leads, as in 10 shown. From the common line 314 Fluid flows through the check valve 310 and into the CTA mode delay chamber 303 , and the wing 104 is in relation to the housing assembly 100 for closing or blocking the feed standard line 128 to the CTA mode feed chamber 302 emotional. While the rotor assembly 105 the feed standard line 128 from the CTA mode feed chamber 303 completes, the wing becomes 104 to a center position or intermediate phase angle position within the chamber 117 moves between the housing assembly 100 and rotor assembly 105 is trained.

If the wing 104 within the housing assembly 100 is arranged near or in the feed position and the deceleration standard line 134 for the CTA mode delay chamber 303 is released, then fluid flows from the CTA mode retard chamber 203 into the delay standard line 134 and through the open pilot valve 330 and to lead 329 leading to the common line 314 leads. From the common line 314 Fluid flows through the check valve 308 and into the CTA mode feed chamber 303 , and the wing 104 is in relation to the housing assembly 100 for closing the delay standard line 134 from the CTA mode delay chamber 203 emotional. While the rotor assembly 105 the delay standard line 134 from the CTA mode delay chamber 203 completes, the wing becomes 104 moved to a center position or intermediate phase angle position within the chamber, which is between the housing assembly 100 and rotor assembly 105 is trained.

The feed standard line 128 and the delay standard line 134 be through the rotor assembly 105 from the CTA mode feed rate and delay chambers 302 . 303 completely closed or blocked when the phaser is in the center position or intermediate phase angle position, which requires that the locking pin 125 into the depression 127 engages exactly at the time at which the feed standard line 128 or the delay standard line 134 be completed by their respective chambers. Alternatively, the feed standard line 128 and the delay standard line 134 in the center position or intermediate phase angle position slightly open or partially to the CTA mode feed and deceleration chamber 302 . 303 be limited so that the rotor assembly 105 can swing easily, so the locking pin 125 more likely about the position of the depression 127 drives, so the locking pin 125 into the depression 127 can intervene.

16 shows an alternative embodiment in which a standard circuit 633 only for the CTA mode delay chamber 303 is present and aids in finding a middle position stop in one direction. The locking circuit 633 allows the adjuster to oscillate between the center position stop and one of the outer stops, for example, the wing 104 in contact with the delay wall 303a or the feedwall 302a is.

The difference between the embodiment 16 and the third embodiment of the 9 to 10 consists in the removal of the feed delay standard line 134 and the check valve 310 between the common line 314 , Management 313 and the CTA mode delay chamber 303 , For this embodiment, identical reference numerals as in the previous figures apply to the above description and are hereby repeated by reference.

The standard hydraulic circuit 333 indicates by a spring 331 preloaded pilot valve 330 and a feed standard line 128 on top of the CTA mode feed chamber 302 with the pilot valve 330 and the common line 314 to check valve 308 combines. The feed standard line 128 is at a predetermined distance or length from the wing 104 , The pilot valve 330 is located in the rotor assembly 105 and is in fluid communication with the locking pin circuit 123 and direction 119a via wire 132 , The locking pin circuit 123 has a locking pin 125 , a locking pin spring 124 , Management 132 , the pilot valve 330 , Feed line 119a and drain line 122 on.

Depending on where the wing is 104 before the duty cycle of the variable force magnet 107 , which was changed to 0%, fluid exits the CTA mode delay chamber 303 through the pipe 313 and flows into the common line 314 through the check valve 308 to the CAT mode feed chamber 302 through the pipe 312 , While the CTA mode feed chamber 302 fills, the feed standard line becomes 128 released and the fluid in the CTA mode feed chamber 302 gets back to the CTA mode feed chamber 302 or CTA mode delay chamber 303 directed, depending on the direction of the cam torque through the pilot valve 230 , Therefore, the adjuster can move freely in the feed direction until the wing 104 the delay wall 303a contacted.

In standard mode, the pusher blocks 111b the flow of fluid from the line 112 to the drainage performance 121 and the pusher survey 111d blocks the flow of fluid from the line 113 to the drainage performance 122 , whereby the fluid from the supply is open between the TA advancing and retarding chambers 102 . 103 can circulate to effectively control the phaser from the control valve 109 to remove. At the same time fluid from the supply by line 119 to lead 119b and the inlet check valve 118 to the wires 112 . 113 flow to the TA feed and retard chambers 102 . 103 lead, as described above, and in the common line 314 through the pilot valve 330 and through a check valve 308 into the CTA mode feed chamber 302 by line 312 and through a check valve 308 into the CTA mode feed chamber 302 by line 312 and thereby to the CTA mode delay chamber 302 by line 313 ,

Through the slide survey 111e will prevent fluid from passing through the pipe 119a to the pilot valve 330 flows. Because no fluid to the line 119a can flow, bleeds the pilot valve 330 to the drainage line 122 and opens the passage between the feed standard line 128 through the pilot valve 330 to lead 329 and the common line 214 in other words, opens or switches the standard hydraulic circuit 633 one.

When the hydraulic lock circuit is open in the retard direction, the stage moves until the feed standard line 128 from the case 100 is completed. The feed standard line 128 is from the rotor assembly 105 from the CTA mode feed chamber 302 closed or blocked when the phaser is in the mid-position or intermediate-phase angular position where it is required that the locking pin 125 into the depression 127 engages exactly at the time when the feed standard line 128 from their respective chambers is completed. When the locking pin 125 not in the depression 127 engages, swing the rotor 105 and the wing 104 between a locking position at which the feed standard line 128 from the case 100 is blocked, and a full feed stop (eg on the side with the shortest path between the center position lock of the locking pin), where the wing 104 with the delay wall 203a comes into contact. When the adjuster vibrates, the locking pin disengages 125 finally with the recess 127 and locks the stage in the middle position.

One of the advantages of providing only one standard conduit on one side of the phaser is the lower cost, because only one and not two check valves are needed and less phasing of the phaser is required.

It is preferred that the check valve and the default line be provided on the side of the longest pathway for the lock pin for engaging the recess rather than the check valve and the default line having the shortest path of the lock pin for engaging the recess be provided, whereby the amount of vibration to the side, z. B. is limited between the intermediate phase angle or the central position stop and the outer stop and thus the stronger vibration occurs at one end of the wing path.

Alternatively, the check valve and the standard line on the opposite side, for example, check valve 308 and feed standard line 128 , also be removed.

11 to 12 shows a fourth embodiment of the present invention, in which a set of chambers 302 . 303 regardless of the torsion-based operating set or sets of the chambers 102 . 103 is isolated and operated only in the CTA mode, similar to the third embodiment. In other words, the CTA mode set (s) of the feed and deceleration chambers become 302 . 303 regardless of the set or sets of torsion-based feed and deceleration chambers 102 . 103 operated. In the fourth embodiment, the chambers are insulated so that one or more sets of torsion-based working chambers 102 . 103 control the position of the phaser when operating with a closed loop control and one or more sets of CTA mode chambers 302 . 303 which only work in standard hydraulic mode. A set of torsion-based working chambers 102 . 103 is through the control valve 109 of "working" or advancing, delaying or holding switched to a position in which the torsion-based chambers 102 . 103 are opened and drained. A set of CTA mode chambers 302 . 303 is switched from "working" or returning oil between the chambers either to advancing or retarding the chambers in terms of reaching the mid-position lock in the return mode when the standard valve is closed.

11 shows the stage in the stop position and the control valve in the stop position. 12 shows the control valve 109 in standard mode and the standard hydraulic circuit at 333 turned on. The feed mode and the deceleration mode are not shown but are similar to those 1 and 2 the first embodiment, wherein the hydraulic circuit 133 is switched off. The standard hydraulic circuit 333 indicates by a spring 331 preloaded pilot valve 330 and a feed standard line 128 on top of the CTA mode feed chamber 302 with the pilot valve 300 and the joint management 314 connects, and a delay standard line 134 containing the CTA mode delay chamber 303 with the pilot valve 330 and the common line 314 combines.

In relation to 11 is the duty cycle of the variable force magnet 107 50% and the power of VFS 107 on one end of the slider 111 is equal to the force of the spring 115 on the opposite end of the slider 111 in holding position. The surveys 111b and 111c block the flow of fluid between the lines 112 and 113 leading to the TA feed and delay chambers 102 . 103 lead, and prevent fluid from the TA feed and -zero delay chamber 102 . 103 to the drainage pipes 122 . 121 is emptied. Nevertheless, the pusher surveys 111b and 111c positioned so that fluid in the pipes 112 and 113a can flow into the feed and deceleration chambers 102 . 103 lead, or may have a restricted flow into it, with fluid also entering the CTA mode feed and delay chambers 302 . 303 through the common line 314 and the check valves 308 . 310 to compensate for a leakage can flow or have a restricted flow in this.

The fluid is the adjuster of the supply S by the pump 140 supplied and passes through a camshaft interface 120 into the pipe 119 one. The administration 119 splits into two lines 119a and 119b on. The administration 119b leads to the inlet check valve 118 and the control valve 109 , From the control valve 109 Fluid enters the lines 112 . 113 leading to the TA feed and delay chambers 102 . 103 cause the same pressure on the feed chamber 102 like on the delay chamber 103 is exercised to hold the wing in place.

The administration 119a leads to the pilot valve 330 , The pressure of the fluid in line 119a moves through the slide 111 between the surveys 111d and 111e to lead 132 to the pilot valve 330 against the spring 331 to push, causing the pilot valve 330 is moved to a position in which the delay standard line 134 , Feed standard line 128 are blocked and the standard circuit is switched off. However, the fluid can be unrestricted and free between the CTA feed chamber 302 and the CTA delay chamber 303 through the pilot valve 330 flow when the standard hydraulic circuit 333 is switched off. The drainage line 122 is from the pusher survey 111d blocked, allowing the vent or opening the standard circuit 333 is prevented.

12 shows the phaser in the center position or intermediate phase angle position, wherein the duty cycle of the variable force magnet is 0%, the slider 109 in standard mode, the pilot valve 330 through the slide to passage 122 is discharged leading to the sump or drain, and the standard hydraulic circuit 333 open or turned on. When the standard hydraulic circuit 333 turned on or open, the fluid may be through the drain lines 121 and 122 from the torsion-based feed chamber 102 and the torsion-based delay chamber 103 empty into the oil pan. Therefore, the sole set of chambers having fluid when the slider is completely off or in standard mode is the one or more sets of CTA mode advance and retard chambers 302 . 303 , The fluid from feed S may pass through a ring (not shown) into the common conduit 314 on the outer diameter of the sleeve 116 stream.

Depending on where the wing is 104 before the duty cycle of the variable force magnet 107 that was changed to 0% will become either the feed standard line 128 or the delay standard line 134 the CTA mode feed or deceleration chamber 302 . 303 Approved. In addition, if the engine has experienced an abnormal shutdown (eg, when the engine stalls), the duty cycle of the variable force solenoid would be at engine startup 107 0%, the rotor assembly 105 would move via the standard circuit to the center position or the inter-phase angular position and the lock pin 125 would be engaged in the mid-position or intermediate-phase angular position, regardless of what position the wing is in 104 with respect to the housing assembly 100 before the abnormal shutdown of the engine.

The ability of the phaser of the present invention to move to a center position or an intermediate phase angular position by default without the use of electronic controls allows the phaser to move to center or intermediate phase angular position even during engine cranking when electronic controls typically are not used to control the phaser position become. Also, by default, the phaser moves to the mid-position or inter-phase angular position, providing a fail-safe position, particularly when control signals or energy are lost, thereby ensuring that the engine can start and run even without active VCT phaser control. Since the phaser is in the center position or intermediate phase angular position when the engine is started, a longer path of the phase of the phaser is possible, allowing for calibration capabilities. In the prior art, longer displacement or longer phase angle stages are not possible because the center position or the intermediate phase angle position is not present at engine start or engine start and the engine has difficulty starting at the outermost feed or deceleration stop.

When the duty cycle of the variable force magnet 107 just set to 0%, the force on the VFS will take on the slider 111 off and the spring 115 moves the slider 111 to the far right end of the gate path to a standard mode, as in 12 shown. In standard mode, the pusher blocks 111c the flow of fluid from the supply line 119b into the pipes 112 and 113 leading to the TA feed and delay chambers 102 . 103 to lead. Instead, the wires are 112 and 113 to the drainage pipes 121 respectively. 122 open and drain the fluid from the TA advance and retard chambers, thereby controlling the phaser from the control valve 109 effectively removed. At the same time fluid from the supply by line 119 to lead 119b and inlet check valve 118 to a ring (not shown) on the outer diameter of the sleeve 116 to the joint leadership 114 and through a check valve 308 . 310 and through the pipes 312 . 313 either in the CTA mode feed chamber 302 or the CTA mode delay chamber 303 stream. The unimpeded flow of fluid between the CTA mode feed chamber 302 and the CTA mode delay chamber 303 is from the pilot valve 330 prevented.

Through the slide survey 111e will prevent fluid from passing through the pipe 119a to the pilot valve 330 flows. Because no fluid to the line 119a can flow, the pilot valve emptied 330 to the drainage line 122 and opens the passage between the feed standard line 128 and the delay standard line 134 through the pilot valve 330 to lead 329 and the common line 314 in other words, it opens or shuts off the standard hydraulic circuit 333 at.

If the wing 104 within the housing assembly 100 is arranged near or in the retard position and the feed standard line 128 for the CTA mode feed chamber 302 is released, then fluid flows from the CTA mode feed chamber 302 in the feed standard line 128 and through the open pilot valve 330 and to lead 329 leading to the common line 314 leads, as in 12 shown. From the common line 314 Fluid flows through the check valve 310 and into the CTA mode delay chamber 303 , and the wing 104 is in relation to the housing assembly 100 for closing or blocking the feed standard line 128 to the CTA mode feed chamber 302 emotional. While the rotor assembly 105 the feed standard line 128 from the CTA mode feed chamber 303 completes, the wing becomes 104 to a center position or intermediate phase angle position within the chamber 117 moves between the housing assembly 100 and rotor assembly 105 is trained.

If the wing 104 within the housing assembly 100 is arranged near or in the feed position and the deceleration standard line 134 for the CTA mode delay chamber 303 is released, then fluid flows from the CTA mode retard chamber 203 into the delay standard line 134 and through the open pilot valve 330 and to lead 329 leading to the common line 314 leads. From the common line 314 Fluid flows through the check valve 308 and into the CTA mode feed chamber 303 , and the wing 104 is in relation to the housing assembly 100 for closing the delay standard line 134 from the CTA mode delay chamber 203 emotional. While the rotor assembly 105 the delay standard line 134 from the CTA mode delay chamber 203 completes, the wing becomes 104 moved to a center position or intermediate phase angle position within the chamber, which is between the housing assembly 100 and rotor assembly 105 is trained.

The feed standard line 128 and the delay standard line 134 be through the rotor assembly 105 from the CTA mode feed and deceleration chambers 302 . 303 completely closed or blocked when the phaser is in the center position or intermediate phase angle position, which requires that the locking pin 125 into the depression 127 engages exactly at the time at which the feed standard line 128 or the delay standard line 134 be completed by their respective chambers. Alternatively, the feed standard line 128 and the delay standard line 134 in the center position or intermediate phase angle position slightly open or partially to the CTA mode feed and deceleration chamber 302 . 303 be limited so that the rotor assembly 105 can swing easily, so the locking pin 125 more likely about the position of the depression 127 drives, so the locking pin 125 into the depression 127 can intervene.

17 shows an alternative embodiment in which a standard circuit 733 only for the CTA mode delay chamber 303 exists and aids in finding a one-way center-stop position. The locking circuit 733 allows the adjuster to swing between the center stop position and one of the outer stops, for example, when the wing 104 in contact with the delay wall 303a or the feedwall 302a is.

The difference between the embodiment 17 and the fourth embodiment 11 to 12 consists in the removal of the feed delay standard line 134 and the check valve 310 between the common line 314 , Management 313 and the CTA mode delay chamber 303 , For this embodiment, identical reference numerals as in the previous figures apply to the above description and are hereby repeated by reference.

The standard hydraulic circuit 333 indicates by a spring 331 preloaded pilot valve 330 and a feed standard line 128 on which the CTA mode feed chamber 302 with the pilot valve 330 and the joint leadership 314 with the check valve 314 combines. The feed standard line 128 is at a predetermined distance or length from the wing 104 arranged. The pilot valve 330 is in the rotor assembly 105 arranged and stands with the locking pin circuit 123 and direction 119a by line 132 in fluid exchange. The locking pin circuit 123 has the locking pin 125 , the locking pin spring 124 , The administration 132 , the pilot valve 330 , Feed line 119a , a drain line 122 on. With standard hydraulic circuit switched on or open 733 may be fluid from the torsion-based feed chamber 102 and the torsion-based delay chamber 103 in the oil pan through drainage pipes 121 and 122 Drain. Therefore, the single set of chambers having fluid when the slider is fully extended or in standard mode is the one or more sets of CTA mode advance and retard chambers 302 . 303 , The fluid from the supply S may pass through a ring (not shown) into a common conduit 314 on the outer diameter of sleeve 116 stream.

Depending on where the wing is 104 before the duty cycle of the variable force magnet 107 , which was changed to 0%, fluid exits the CTA mode delay chamber 303 through the pipe 313 and flows into the common line 314 through the check valve 308 to the CAT mode feed chamber 302 through the pipe 312 , While the CTA mode feed chamber 302 fills, the feed standard line becomes 128 released and the fluid in the CTA mode feed chamber 302 gets back to the CTA mode feed chamber 302 or CTA mode delay chamber 303 directed, depending on the direction of the cam torque through the pilot valve 230 , Therefore, the adjuster can move freely in the feed direction until the wing 104 the delay wall 303a contacted.

In standard mode, the slider survey allows 111b the flow of fluid from conduit 112 to drain line 121 and pusher survey 111d allows the flow of fluid from conduit 113 to drain line 122 whereby the fluid from the TA feed and retard chambers into the sump can be emptied. At the same time, the fluid from the supply by line 119 to lead 119b and inlet check valve 118 to the joint leadership 314 flow and through the pilot valve 300 and through a check valve 308 into the CTA mode feed chamber 302 and through the CTA mode delay chamber 302 through the pipes 312 . 313 ,

Through the slide survey 111e will prevent fluid from passing through the pipe 119a to the pilot valve 330 flows. Because no fluid to the line 119a can flow, bleeds the pilot valve 330 to the drainage line 122 and opens the passage between the feed standard line 128 through the pilot valve 330 to lead 329 and the common line 314 in other words, opens or switches the standard hydraulic circuit 733 one.

When the hydraulic lock circuit is open in the retard direction, the stage moves until the feed standard line 128 from the case 100 is completed. The feed standard line 128 is from the rotor assembly 105 from the CTA mode feed chamber 302 closed or blocked when the phaser is in the mid-position or intermediate-phase angular position where it is required that the locking pin 125 into the depression 127 engages exactly at the time when the feed standard line 128 completed by their respective chambers. When the locking pin 125 not in the depression 127 engages, swing the rotor 105 and the wing 104 between a locking position at which the feed standard line 128 from the case 100 is blocked, and a full feed stop (eg on the side with the shortest path between the center position lock of the locking pin), where the wing 104 with the delay wall 303a comes into contact. When the adjuster vibrates, the locking pin disengages 125 finally with the recess 127 and locks the stage in the middle position.

One of the advantages of providing only one standard conduit on one side of the phaser is the lower cost, because only one and not two check valves are needed and less phasing of the phaser is required.

It is preferred that the check valve and the default line be provided on the side of the longest pathway for the lock pin for engaging the recess rather than the check valve and the default line having the shortest path of the lock pin for engaging the recess be provided, whereby the amount of vibration to the side, z. B. is limited between the intermediate phase angle or the central position stop and the outer stop and thus the stronger vibration occurs at one end of the wing path.

Alternatively, the check valve and the standard line on the opposite side, for example, check valve 308 and feed standard line 128 , also be removed.

13 shows a fifth embodiment of the present invention, in which, when the hydraulic locking circuit 133 open and the control valve 409 in standard mode is the control valve 409 the drain holes 121 . 122 blocked and hydraulic fluid either the feed chamber 102 or the delay chamber 103 is supplied and the hydraulic locking circuit 133 the other feed or delay chamber 102 . 103 Supplying fluid.

The housing assembly 100 the adjuster has an outer circumference 101 for accepting the driving force. The rotor assembly 105 is with the camshaft 126 connected and in the housing assembly 100 arranged coaxially. The rotor assembly 105 has a wing 104 on, the one chamber 117 between the housing assembly 100 and the rotor assembly 105 is formed in a feed chamber 102 and a delay chamber 103 separates. The wing 104 can rotate to the relative angular position of the housing assembly 100 and the rotor assembly 105 to move. In addition, a standard hydraulic circuit 133 and a locking pin circuit 123 available. The standard hydraulic circuit 133 and the locking pin circuit 123 are essentially a circuit as described above, but will be described separately for the sake of simplicity.

The standard hydraulic circuit 133 indicates by a spring 131 preloaded pilot valve 130 and a feed standard line 128 on which the feed chamber 102 with the pilot valve 130 and the joint leadership 114 with the check valves 108 . 110 connects, as well as a delay standard line 134 that the delay chamber 103 with the pilot valve 130 and the joint leadership 114 with the check valves 108 . 110 combines. The feed standard line 128 and the delay standard line 134 are at a predetermined distance or length from the wing 104 , The pilot valve 130 is in the rotor assembly 105 arranged and in fluid communication with the locking pin circuit 123 and direction 119a by line 132 , The locking pin circuit 123 has the locking pin 125 , The administration 132 , the pilot valve 130 , the supply line 119a and the drainage line 122 on.

The locking pin 125 is slidable in a hole in the rotor assembly 105 accommodated and has an end portion which is in the direction of a recess 127 in the housing group 100 over a spring 124 biased and fitted in it. Alternatively, the locking pin 125 in the housing assembly 100 be housed, and the spring 124 can to the depression 127 in the rotor assembly 105 be biased. Opening and closing the standard hydraulic circuit 133 and the application of pressure of the locking pin circuit 123 Both are controlled by the switching / movement of the phase control valve 109 controlled.

A control valve 409 , preferably a slide valve, has a slide 411 with cylindrical elevations 411a . 411b . 411c . 411d and 411e on, slidable in the sleeve 116 within a bore in the rotor 105 are recorded, and controls the camshaft 126 in front. One end of the slider contacts the spring 115 and the opposite end of the slider contacts a pulse width modulated variable force (VFS) magnet 107 , The magnet 107 may also be linearly controlled by varying the current or voltage or optionally other methods. Also, the opposite end of the slider 111 touching and being affected by a motor or other actuators.

The position of the slider 411 is by a spring 115 influenced and the magnet 107 is from the ECU 106 controlled. Further details regarding the control of the phaser will be explained in detail below. The position of the slider 411 controls the movement (eg, to move to the feed position, the hold position, or the delay position) of the phaser and controls whether the lock pin circuit 123 and the standard hydraulic circuit 133 open (on) or closed (off). In other words, the position of the slider 411 actively controls the pilot valve. The control valve 409 has a feed mode, a delay mode, a stop position and a standard mode.

In feed mode, the slider 411 moved to a position so that fluid from the supply S via pump 140 through the inlet check valve 118 , by wire 119b to the feed chamber 102 can flow and fluid from the delay chamber 103 through the slider 411 into the drainage pipe 121 exit. The standard valve circuit 133 is switched off or closed and the locking pin 125 is preferably unlocked.

In deceleration mode, the slider 411 moved to such a position that fluid from the supply S through the pump 140 through the inlet check valve 118 through the pipe 119b to the delay chamber 103 can flow and fluid from the feed chamber 102 through the slider 411 from the drainage line 122 exit. The standard valve circuit 133 is off and the locking pin 125 is preferably unlocked.

In the stop position or in zero mode, the slider 411 moved to a position leading to the feed chamber 102 and to the delay chamber 103 is partially open and allows the supplied fluid in the feed and retardation chamber 102 . 103 flows, with the same pressure on the feed chamber and the delay chamber is applied to hold the wing position. The standard valve circuit 133 is off and the locking pin 125 is preferably unlocked.

When the duty cycle of the variable force magnet 107 0%, the slide is in standard mode, the pilot valve 130 is emptied, the standard hydraulic circuit 133 is open or turned on and the locking pin circuit 123 is switched off or closed, the locking pin 125 is emptied and reaches into a depression 127 one and the rotor 105 is in relation to the housing assembly 100 locked in a center position or an intermediate phase angle position.

Depending on where the wing is 104 before the duty cycle of the variable force magnet 107 that was changed to 0% will either be the feed standard line 128 or the delay standard line 134 for the feed or delay chamber 102 . 103 Approved. In addition, if the engine has experienced an abnormal shutdown (eg, when the engine stalls), the duty cycle of the variable force solenoid would be at engine startup 107 0%, the rotor assembly 105 would be over the standard circuit 133 move to the middle lock position or an intermediate phase angle position and the lock pin 125 would be engaged in the mid-position or intermediate-phase angular position, regardless of what position the wing is in 104 with respect to the housing assembly 100 before the abnormal shutdown of the engine. In the present invention, the standard mode is preferably when the slider is an outer path end. In the examples illustrated in the present invention, this is the case when the slider is at an outer fully extended position from the bore, although other positions of the slider may be used.

The ability of the phaser of the present invention to move to a center position or an intermediate phase angular position by default without the use of electronic controls allows the phaser to move to center or intermediate phase angular position even during engine cranking when electronic controls typically are not used to control the phaser position become. Also, by default, the phaser moves to the mid-position or inter-phase angular position, providing a fail-safe position, particularly when control signals or energy are lost, thereby ensuring that the engine can start and run even without active VCT phaser control. Since the phaser is in the center position or intermediate phase angular position when the engine is started, a longer path of the phase of the phaser is possible, allowing for calibration capabilities. In the prior art, longer displacement or longer phase angle stages are not possible because the center position or the intermediate phase angle position is not present at engine start or engine start and the engine has difficulty starting at the outermost feed or deceleration stop.

When the duty cycle of the variable force magnet 107 is set to 0%, the force on the VFS on the slider decreases 411 off and the spring 115 moves the slider 411 to the far right end of the spool path to a standard position, as in 13 shown. In this default position, the slider bump blocks 411b the flow of fluid from conduit 113 to the drain opening 121 and the pusher survey 411d blocks the flow of fluid from the line 112 to the drain opening 122 , whereby the control of the adjuster effective from the control valve 409 Will get removed. At the same time fluid from the supply by line 119 to lead 119b and through the inlet check valve 118 to the delay chamber 103 flow as in 13 shown. However, the fluid may alternatively be the feed chamber 102 instead of the delay chamber 103 supplied as shown.

The fluid from the supply flows from conduit 119b to the control valve 409 between the pusher elevation 411c and 411b to the delay line 113 leading to the delay chamber 103 leads. Through the slide survey 411c will prevent fluid from the control valve 409 and the feed pump 140 directly to the feed chamber 102 flows. The pusher survey 411e also prevents fluid from passing through the pipe 119a to the locking pin 125 flows. Because the fluid is not too conductive 119a can flow, is the locking pin 125 no longer under pressure and gets through the slider 411 between the pusher elevation 411d and pusher survey 411e into the drainage pipe 122 emptied. The pilot valve also deflates in the same way 130 into the drainage pipe 122 and opens the passage between the feed standard line 128 and the delay standard line 134 through the pilot valve 130 to lead 129 and to the common line 114 in other words, it opens the standard hydraulic circuit 133 and converts substantially all torsion-based chambers into cam torque actuated chambers (CTA) or CTA mode, wherein the circulation of fluid between the feed chamber 102 and the delay chamber 103 is possible. Therefore, fluid coming from the control valve 409 the delay chamber 103 is fed into the standard line 134 through the pilot valve 130 to lead 129 and to the common line 114 through the check valve 108 by line 112 to the feed chamber 102 stream.

If the wing 104 within the housing assembly 100 was arranged near or in the feed position and the deceleration standard line 134 for the delay chamber 103 is released, then fluid flows from the delay chamber 103 into the delay standard line 134 and through the open pilot valve 130 and to lead 129 leading to the common line 114 leads. From the common line 114 Fluid flows through the check valve 108 and in the feed chamber 102 which makes it the wing 104 with respect to the housing assembly 100 moved to the delay standard line 134 to the delay chamber 102 complete. Because the rotor 105 the line of the feed standard line 134 from the delay chamber 103 completes, the wing becomes 104 moved to an intermediate phase angular position or center position within the chamber, between the housing assembly 100 and rotor assembly 105 is formed, and the locking pin 125 aligns with the depression 127 out, causing the rotor 105 with respect to the housing assembly 100 is locked in a middle position or intermediate phase angle position.

If the wing 104 within the housing assembly 100 was located near or in the retarded position and the feed standard line 128 for the feed chamber 102 is released, then fluid flows from the feed chamber 102 in the feed standard line 128 and through the open pilot valve 130 to lead 129 leading to the common line 114 leads. From the common line 114 Fluid flows through the check valve 110 and in the delay chamber 103 , causing the wing 104 with respect to the housing assembly 100 to complete or block the feed standard line 128 to the feed chamber 102 is moved. Because the rotor assembly 105 the feed standard line 128 from the feed chamber 102 completes, the wing becomes 104 moved to an intermediate phase angular position or center position within the chamber, between the housing assembly 100 and rotor assembly 105 is formed, and the locking pin 125 aligns with the depression 127 out, causing the rotor 105 with respect to the housing assembly 100 is locked in a middle position or intermediate phase angle position.

The feed standard line 128 and the delay standard line 134 be through the rotor assembly 105 from the feed and deceleration chambers 102 . 103 completely closed or blocked when the phaser is in the center position or intermediate phase angle position, which requires that the locking pin 125 with the recess 127 at the precise moment when the feed standard line 128 or the delay standard line 134 completed by their respective chambers. Alternatively, the feed standard line 128 and the delay standard line 134 slightly open or partially to the feed and deceleration chamber 102 . 103 be limited in the center position or intermediate phase angle position, so that the rotor assembly 105 can swing easily, so the locking pin 125 more likely about the position of the depression 127 drives, so the locking pin 125 with the recess 127 can be engaged.

In relation to 18 is the standard circuit in an alternative embodiment 833 only for the feed chamber 102 Exists and supports the search of a middle position stop in one direction. The locking circuit 833 allows the adjuster to oscillate between the mid-position stop and one of the outer stops, for example, the wing 104 with the feedwall 102 or the delay wall 103a in contact.

The difference between the embodiment 18 and the fifth embodiment 13 is the removal of the delay standard line 134 and the check valve 110 between the common line 114 , Management 112 and the delay chamber 103 , For this embodiment, identical reference numerals as in the previous figures apply to the above description and are hereby repeated by reference.

The standard hydraulic circuit 833 indicates by a spring 131 preloaded pilot valve 130 on top of that with a feed standard line 128 connected to the feed chamber 102 with the pilot valve 130 and the joint leadership 114 with the check valve 108 combines. The feed standard line 128 is at a predetermined distance or length from the wing 104 , The pilot valve 130 is located in the rotor assembly 105 and stands by lead 132 in fluid communication with the locking pin circuit 123 and direction 119a , The locking pin circuit 123 has a locking pin 125 , a locking pin spring 124 , Management 132 , Pilot valve 130 , Feed line 119a and drain line 122 on.

In standard mode, the slider moves 411 in a position where the pusher elevations 411d and 411b the flow of fluid from conduit 112 and direction 113 block so this is the chambers 102 . 103 through the drainage pipes 121 . 122 can not leave, and only allows a small amount of pressurized fluid from the feed S in the delay chamber 102 and the feed chamber 102 can reach the feed and deceleration chambers 102 . 103 fully maintain and control the phaser from the control valve 409 effective to remove.

When the standard valve circuit is on or open and the standard valve is open, one or more torsional feed and retard chambers are created 102 . 103 placed in the cam torque actuated (CTA) mode. In other words, fluid may be recirculated between the advancement chamber and the retard chamber rather than being filled into one chamber and drained in the opposite chamber and exiting through drain lines. The standard valve circuit 833 has complete control over the phaser, which is advanced or retracted until the wing 104 reaches the intermediate phase angle position.

In standard mode, the locking pin circuit 123 deflated, so the locking pin 125 with the recess 127 engaged. The interphase angular position or center position is present when the wing 104 somewhere between the feedwall 102 and the delay wall 103a located the chamber between the housing assembly 100 and the rotor assembly 105 define. The intermediate phase angular position may be anywhere between the feedwall 102 and the delay wall 103a and is determined by where the feed standard pass 128 in relation to the wing 104 located.

Depending on where the wing is 104 before the duty cycle of the variable force magnet 107 Fluid that was set to 0%, fluid exits the delay chamber 103 by line 113 and flows into the common line 114 , through the check valve 108 to the feed chamber 102 by line 112 , While the feed chamber 102 fills, the feed standard line becomes 128 released and the fluid in the feed chamber 102 back into the feed chamber 102 or delay chamber 103 directed, depending on the direction of the cam torque through the pilot valve 130 , Therefore, the adjuster can move freely in the feed direction until the wing 104 with the delay wall 103a comes into contact. In the retard direction, when the hydraulic lock circuit is open, the stage moves until the feed standard line 128 from the case 100 is completed. The feed standard line 128 is through the rotor assembly 105 from the feed chamber 102 locked or locked when the phaser is in the mid-position or intermediate-phase angular position where the lock pin is located 125 into the depression 127 must intervene at the precise moment when the feed standard line 128 completed by their respective chambers. When the locking pin 125 not in the depression 127 engages, swing the rotor 105 and the wing 104 between a locking position at which the feed standard line 128 from the case 100 and a complete feed stop is blocked (eg on the side with the shortest path between the center position lock of the lock pin), the wing 104 with the delay wall 103a comes into contact. When the adjuster vibrates, the locking pin disengages 125 finally with the recess 127 and locks the stage in the middle position.

One of the advantages of providing only one standard conduit on one side of the phaser is the lower cost, because only one and not two check valves are needed and less phasing of the phaser is required.

It is preferred that the check valve and the default line be provided on the side of the longest pathway for the lock pin for engaging the recess rather than the check valve and the default line having the shortest path of the lock pin for engaging the recess be provided, whereby the amount of vibration to the side, z. B. is limited between the intermediate phase angle or the central position stop and the outer stop and thus the stronger vibration occurs at one end of the wing path.

Alternatively, the check valve and the standard line on the opposite side, for example, check valve 108 and feed standard line 128 , also be removed.

In the illustrated embodiments with the control valve in the rotor, it will be understood that one skilled in the art could also use a remote control valve.

In all embodiments, the standard mode of the control valve is when the control valve is at the outer end of its travel. The outer travel end is preferably present when the slider is fully biased by the spring out of the bore.

Although all embodiments are illustrated with an inlet check valve and therefore a torsioned phaser, one skilled in the art will be able to apply all of the above embodiments to an oil pressure actuated phaser wherein the inlet check valve 118 is removed.

Accordingly, it will be understood that the embodiments of the invention described herein are merely illustrative of the application of the principles of the invention. Reference herein to details of the illustrated embodiments is not intended to limit the scope of the claims in any way that itself describes the features essential to the invention.

Claims (22)

A variable displacement camshaft phaser for an internal combustion engine having a housing assembly having an outer periphery for receiving a driving force and a rotor assembly coaxial within the housing for connection to a housing Camshaft having a plurality of wings, wherein the housing assembly and the rotor assembly define at least one chamber which is separated from a wing in a feed chamber and a delay chamber, wherein the wing within the chamber causes the relative angular position of the housing assembly and the Rotor assembly is displaced when the feed chamber or the delay chamber fluid is supplied, wherein the adjuster comprises: a control valve for directing fluid from a fluid input to and from the feed chamber and the delay chamber by a feed line, a delay line, a supply line, with the Fluid input is coupled, and at least one drain line; and wherein the control valve is movable between a standard mode and an oil pressure actuated mode, comprising: a feed mode in which fluid is directed from the fluid input to the advancement chamber and fluid is directed from the retard chamber to the exhaust conduits; a deceleration mode in which fluid is directed from the fluid input to the retard chamber and in which fluid is directed from the advancement chamber to the exhaust conduits; a holding position in which fluid is supplied to the feed chamber and the delay chamber; wherein, when the control valve is in the standard mode, the control valve blocks the at least one drain line, thereby retaining fluid in the feed chamber and the delay chamber. The stage of claim 1, wherein when the control valve is in the standard mode, fluid flows from the supply line to the feed chamber and the delay chamber is restricted. An adjuster according to claim 1, wherein, when the control valve is in the standard mode, the fluid flows to either the advancement chamber or the retard chamber and the flow through the control valve to the other advancement chamber or the other retard chamber is blocked. The stage of claim 1, further comprising a standard circuit that is switchable from an open position to a closed position, wherein when the standard circuit is in the open position, the standard circuit moves the wing to an intermediate position within the at least one chamber is defined by the housing assembly and the rotor assembly. A stage according to claim 4, wherein, when the standard circuit is in a closed position, the control valve is moved to the oil pressure actuated mode and the fluid flows through the control valve to actuate the feed and retard chamber by oil pressure. Stage according to claim 4, wherein, when the standard circuit is open, fluid between a feed standard line to at least one feed chamber and a delay standard line to at least one delay chamber and a common line, which is in fluid communication with the feed chamber and with the delay chamber with feed and delay check valves, can flow, so that the rotor assembly is moved by the cam torque operation of a feed chamber and a delay chamber in an intermediate phase angular position with respect to the housing assembly and held therein. A stage according to claim 4, wherein, when the standard circuit is open, fluid flows between either the feed chamber or the delay chamber through a feed standard line or a delay standard line to the other feed chamber or delay chamber and through the feed chamber or delay chamber to the other feed chamber and retard chamber through a common line can, so that the standard circuit limits the movement of the rotor assembly to the intermediate position in one direction only. Stage according to claim 4, wherein the standard circuit between the open position and the closed position via a pilot valve is switchable. The phaser of claim 1, wherein the fluid input to the phaser further comprises an inlet check valve. A stage according to claim 1, further comprising: a lock pin slidably disposed in the rotor assembly or the housing assembly, the lock pin being blocked by fluid in the supply line from a locked position in which an end portion engages a recess, thereby locking the relative angular position of the housing assembly and the rotor assembly an unlocked position in which the end portion does not engage the recess is movable; and wherein, when the control valve is moved to the standard mode, the lock pin is moved to the locked position; wherein, when the control valve is moved to the feed mode or the deceleration mode or to the stop position, the lock pin is moved to the unlocked position. The stage of claim 1, wherein when the control valve is in standard mode, the flow of fluid from the supply line to the feed chamber and the delay chamber is unrestricted. The stage of claim 11, further comprising a standard circuit switchable from an open position to a closed position, wherein when the standard circuit is in the open position, the standard circuit moves the wing to an intermediate position within the at least one chamber selected from the housing assembly and the rotor assembly is defined. The phaser of claim 12, wherein when the standard circuit is in the open position, one or more feed chambers and delay chambers are functionally isolated and fluid in the feed line flows unrestrictedly to the remaining feed chambers and delay chambers such that the fluid flow flows back between the remaining feed chambers and delay chambers can be, with the influence of the wing is removed within the remaining feed and retard chambers and the functionally isolated feed and retard chambers of oil pressure actuated to cam torque actuated by fluid in the supply line between a feed standard line to a feed chamber and a delay standard line to the functionally isolated feed chamber and delay chamber can flow and a common line with the functionally isolated feed chamber and delay chamber and the delay skammer is in fluid communication with feed and deceleration check valves; and wherein, when the standard circuit is in the closed position, the fluid flows through the control valve to actuate the remaining feed and retard chambers with oil pressure and the one or more feed chambers and retard chambers, which are functionally isolated again with the control valve and the To connect oil pressure actuator. A stage according to claim 11, further comprising: a lock pin slidably disposed in the rotor assembly or the housing assembly, the lock pin being blocked by fluid in the supply line from a locked position in which an end portion engages a recess, thereby locking the relative angular position of the housing assembly and the rotor assembly an unlocked position in which the end portion does not engage the recess is movable; and wherein, when the control valve is moved to the standard mode, the lock pin is moved to the locked position; wherein, when the control valve is moved to the feed mode or the deceleration mode or to the stop position, the lock pin is moved to the unlocked position. A variable cam timing phaser for an internal combustion engine, comprising: a housing assembly having an outer periphery for receiving a driving force; a rotor assembly disposed coaxially within the housing for connection to a camshaft having a plurality of wings; wherein the housing assembly and the rotor assembly define at least one cam torque actuated chamber separated by a cam torque vane into a cam torque actuated advance chamber and a cam torque actuated retard chamber such that fluid flow between the cam torque actuated advance chamber and the cam torque actuated retard chamber responsive to cam torque forces in the camshaft enables the cam torque vane to shift a relative angular position of the housing assembly with respect to the rotor assembly; and wherein the housing assembly and the rotor assembly define at least one oil pressure actuated chamber separated from an oil pressure actuated vane into an oil pressure actuated feed chamber and an oil pressure actuated retard chamber so that the fluid pressure supplied to the oil pressure actuated feed chamber or the oil pressure actuated retard chamber moves the oil pressure vane to move the oil pressure vane shift the relative angular position of the housing assembly relative to the rotor assembly; and wherein the oil pressure actuated chambers are functionally isolated from the cam torque actuated chambers; a control valve for directing fluid from a fluid input to and from the oil pressure actuated feed chamber and the oil pressure actuated retard chamber through a feed line, a delay line, a supply line coupled to the fluid input, and at least one drain line; and wherein the control valve is movable between a standard mode and an oil pressure actuated mode and includes: a feed mode in which fluid is directed from the fluid input to the oil pressure actuated feed chamber and fluid is directed from the oil pressure actuated retard chamber to the exhaust conduits; a deceleration mode in which fluid is directed from the fluid input to the oil pressure actuated retard chamber and fluid from the oil pressure actuated feed chamber to the exhaust conduits; a holding position in which fluid is directed to the oil pressure actuated feed chamber and the oil pressure actuated retard chamber; and wherein, when the control valve is in the standard mode, the control valve blocks at least one drain line, thereby retaining fluid within the oil pressure actuated feed chamber and the oil pressure actuated retard chamber, and supplying an unrestricted flow of oil to the oil pressure actuated feed chamber and the oil pressure operated retard chamber; a standard circuit switchable from an open position to a closed position; wherein, when the standard circuit is in the open position, fluid can flow between a default feed line to the cam torque actuated feed chamber and a deceleration standard line to the cam torque actuated retarding chamber and a common line in fluid communication with the cam torque actuated feed chamber and retard chamber with advance and retard check valves such that the rotor assembly is moved and held in an intermediate phase angle position with respect to the housing assembly by the cam torque operation of the feed chamber and the retard chamber; wherein, when the standard circuit is closed, fluid flows unrestrictedly between the cam torque actuated feed chamber and the cam torque actuated retard chamber. Stage according to claim 15, wherein the standard circuit between the open position and the closed position via a pilot valve is switchable. The phaser of claim 15, wherein a locking pin is slidably disposed in the rotor assembly or the housing assembly, wherein the locking pin of the fluid in the supply line from a locked position in which an end portion engages a recess, whereby the relative angular position of the housing assembly and the Locked rotor assembly is in an unlocked position in which the end portion does not engage the recess, is movable; wherein, when the control valve is moved to the standard mode, the lock pin is moved to the locked position; wherein, when the control valve is moved to the feed mode or the deceleration mode or to the stop position, the lock pin is moved to the unlocked position. The phaser of claim 15, wherein the fluid input to the phaser further comprises an inlet check valve. A variable cam timing phaser for an internal combustion engine, comprising: a housing assembly having an outer periphery for receiving a driving force; a rotor assembly disposed coaxially within the housing for connection to a camshaft having a plurality of wings; wherein the housing assembly and the rotor assembly define at least one cam torque actuated chamber separated by a cam torque vane into a cam torque actuated advance chamber and a cam torque actuated retard chamber such that fluid flow between the cam torque actuated advance chamber and the cam torque actuated retard chamber responsive to cam torque forces in the camshaft enables the cam torque vane to shift a relative angular position of the housing assembly with respect to the rotor assembly; and wherein the housing assembly and the rotor assembly define at least one oil pressure actuated chamber separated from an oil pressure actuated vane into an oil pressure actuated feed chamber and an oil pressure actuated retard chamber so that the fluid pressure supplied to the oil pressure actuated feed chamber or the oil pressure actuated retard chamber moves the oil pressure vane to move the oil pressure vane shift the relative angular position of the housing assembly relative to the rotor assembly; and wherein the oil pressure actuated chambers are functionally isolated from the cam torque actuated chambers; a control valve for directing fluid from a fluid input to and from the oil pressure actuated feed chamber and the oil pressure actuated retard chamber through a feed line, a delay line, a supply line coupled to the fluid input, and at least one drain line; and wherein the control valve is movable between a standard mode and an oil pressure actuated mode and includes: a feed mode in which fluid is directed from the fluid input to the oil pressure actuated feed chamber and fluid is directed from the oil pressure actuated retard chamber to the exhaust conduits; a deceleration mode in which fluid is directed from the fluid input to the oil pressure actuated retarding chamber and wherein fluid is directed from the oil pressure actuated feed chamber to the exhaust conduits; a holding position in which fluid is directed to the oil pressure actuated feed chamber and the oil pressure actuated retard chamber; wherein, when the control valve is in the standard mode, it discharges the oil pressure actuated feed chamber and the oil pressure actuated retard chamber through exhaust ducts and blocks the control valve fluid from the supply duct to the oil pressure actuated feed chamber and the oil pressure actuated retard chamber; a standard circuit switchable from an open position to a closed position; wherein, when the standard circuit is in the open position, fluid between a feed standard line to the cam torque actuated feed chamber and a delay standard line to the cam torque actuated retarding chamber and a common line in fluid communication with the cam torque actuated feed chamber and retard chamber with feed and retard check valves, so that the rotor assembly moves by the cam torque actuation of the feed chamber and the retard chamber to an intermediate phase angular position with respect to the housing assembly and is held in this; wherein, when the standard circuit is closed, fluid flows unrestrictedly between the cam torque actuated feed chamber and the cam torque actuated retard chamber. A stage according to claim 19, wherein the standard circuit is switchable between the open position and the closed position via a pilot valve. The phaser of claim 19, wherein a locking pin is slidably disposed in the rotor assembly or the housing assembly, wherein the locking pin of the fluid in the supply line from a locked position in which an end portion engages a recess, whereby the relative angular position of the housing assembly and the Locked rotor assembly is in an unlocked position in which the end portion does not engage the recess, is movable; wherein, when the control valve is moved to the standard mode, the lock pin is moved to the locked position; wherein, when the control valve is moved to the feed mode or the deceleration mode or to the stop position, the lock pin is moved to the unlocked position. The phaser of claim 19, wherein the fluid input to the phaser further comprises an inlet check valve.

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